This book answers a question that has troubled many Yoga students for years: Does Patanjali’s Yoga-Sūtra champion a dualistic philosophy, as often maintained, or is it possible to understand it from a nondualistic perspective? Georg Feuerstein finally answers this important question by showing that several traditional commentators—notably Vijnāna Bhikshu (16th century, Nārāyana Swami (xxth century), and Swami Vivekananda (20th century)—favored a nondualistic interpretation.